Sclerospora graminicola (Saccardo) Schröter, 1886

on Poaceae

Setaria verticillata, Belgium, prov. Flemish Brabant, Geetbets, 1.ix.2021 © Carina Van Steenwinkel: infected plants

lesions

detail

conidiophore (congo-red staining)

terminal branchings

detail

conidia (13-17 x 16-22 µm)

dead plant tissue with oospores

oospores

detail

gall

Infested leaves remain rolled in, they are sometimes strongly thickened, brittle, pale at first, finally dark brown. Under humid condition temporarily a white thin fungal down appears, consisting of vertical, terminally several times branching conidiophores. Plants abnormally bushy. When they disintegrate the brown, naked, 30-55 µm large oospores are released.

host plants

Poaceae, oligophagous

Agrostis stolonifera; Digitaria sanguinalis; Echinochloa crus-galli; Elymus caninus; Panicum miliaceum; Poa nemoralis; Setaria adhaerens, italica, pumila, verticillata, viridis; Sorghum bicolor.

references

Buhr (1964a, 1965a), Dauphin & Aniotsbehere (1997a), Doppelbaur, Huber & Poelt (1965a), Göker, Voglmayr, Riethmüller ao (2003a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2019a), Müller & Kokeš (2008a), Roskam (2019a), Tomasi (2014a).